US20030064164A1 - Apparatus and method for coating photoreceptor substrates - Google Patents

Apparatus and method for coating photoreceptor substrates Download PDF

Info

Publication number
US20030064164A1
US20030064164A1 US09/969,387 US96938701A US2003064164A1 US 20030064164 A1 US20030064164 A1 US 20030064164A1 US 96938701 A US96938701 A US 96938701A US 2003064164 A1 US2003064164 A1 US 2003064164A1
Authority
US
United States
Prior art keywords
objects
layers
rounded
rounded objects
shaped
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US09/969,387
Other versions
US6569499B2 (en
Inventor
Steven Grammatica
Eugene Swain
Christopher Fridd
Kathryn Lalone
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xerox Corp
Original Assignee
Xerox Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xerox Corp filed Critical Xerox Corp
Priority to US09/969,387 priority Critical patent/US6569499B2/en
Assigned to XEROX CORPORATION reassignment XEROX CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SWAIN, EUGENE A., FRIDD, CHRISTOPHER R., GRAMMATICA, STEVEN J., LALONE, KATHRYN T.
Assigned to BANK ONE, NA, AS ADMINISTRATIVE AGENT reassignment BANK ONE, NA, AS ADMINISTRATIVE AGENT SECURITY AGREEMENT Assignors: XEROX CORPORATION
Priority to JP2002278277A priority patent/JP2003154299A/en
Priority to BRPI0203987-7A priority patent/BR0203987B1/en
Priority to DE60218797T priority patent/DE60218797T2/en
Priority to EP02022107A priority patent/EP1300197B1/en
Priority to US10/287,754 priority patent/US6746538B2/en
Publication of US20030064164A1 publication Critical patent/US20030064164A1/en
Publication of US6569499B2 publication Critical patent/US6569499B2/en
Application granted granted Critical
Assigned to JPMORGAN CHASE BANK, AS COLLATERAL AGENT reassignment JPMORGAN CHASE BANK, AS COLLATERAL AGENT SECURITY AGREEMENT Assignors: XEROX CORPORATION
Priority to US11/438,405 priority patent/US20060208768A1/en
Assigned to XEROX CORPORATION reassignment XEROX CORPORATION RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: JPMORGAN CHASE BANK, N.A.
Assigned to XEROX CORPORATION reassignment XEROX CORPORATION RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANK ONE, NA
Anticipated expiration legal-status Critical
Assigned to XEROX CORPORATION reassignment XEROX CORPORATION RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: JPMORGAN CHASE BANK, N.A. AS SUCCESSOR-IN-INTEREST ADMINISTRATIVE AGENT AND COLLATERAL AGENT TO JPMORGAN CHASE BANK
Assigned to XEROX CORPORATION reassignment XEROX CORPORATION RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: JPMORGAN CHASE BANK, N.A. AS SUCCESSOR-IN-INTEREST ADMINISTRATIVE AGENT AND COLLATERAL AGENT TO BANK ONE, N.A.
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C3/00Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/02Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material
    • B05C3/09Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material the work being immersed in the liquid or other fluent material for treating separate articles
    • B05C3/109Passing liquids or other fluent materials into or through chambers containing stationary articles
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/02Charge-receiving layers
    • G03G5/04Photoconductive layers; Charge-generation layers or charge-transporting layers; Additives therefor; Binders therefor
    • G03G5/05Organic bonding materials; Methods for coating a substrate with a photoconductive layer; Inert supplements for use in photoconductive layers
    • G03G5/0525Coating methods

Definitions

  • This invention relates to coating photoreceptor substrates using dip tanks and more particularly to coating photoreceptor substrates using a dip tank arranged with a plurality of layers of rounded objects or beads.
  • a photoreceptor substrate (belt or drum) is immersed or “dipped” into the orifice of a tank containing the solution to be coated and then withdrawn at a rate that controls the coating thickness.
  • the usual mechanism to coat the substrate is to pump a coating solution containing the active materials, either dissolved or in suspension (such as pigments), into the tank from an inlet located in the bottom of the diptank and continuously overflow the tank at the orifice located at the top of the tank. In this way the substrate is subjected to a uniform flow of solution relative to the coating speed.
  • an apparatus for coating at least one substrate with a fluid comprises at least one diptank defining an inlet and a conduit with an orifice, the conduit including means for suspending a plurality of layers of rounded objects so that fluid supplied to the inlet flows through the plurality of layers of rounded objects to coat a substrate that is inserted through the orifice.
  • a method for coating at least one substrate with a fluid uses an apparatus comprising at least one diptank defining an inlet and a conduit with an orifice, the conduit including means for suspending a plurality of layers of rounded objects, so that fluid supplied to the inlet flows through the plurality of layers of rounded objects to coat a substrate that is inserted through the orifice.
  • the method comprises supplying fluid to the inlet and inserting at least one substrate through the orifice.
  • FIG. 1 depicts an apparatus 100 for coating photoreceptor substrates in accordance with the present invention.
  • FIG. 2A depicts a photoreceptor belt substrate 20 A that may be coated by the FIG. 1 apparatus.
  • FIG. 2B depicts a photoreceptor drum substrate 20 B that may be coated by the FIG. 1 apparatus.
  • FIG. 3A depicts a first porous element 31 of the apparatus 100 .
  • FIG. 3B depicts a second porous element 32 of the apparatus 100 .
  • FIG. 4 depicts various embodiments of rounded objects or beads 400 that may be used in the apparatus 100 .
  • the rounded objects 400 include a spherical-shaped embodiment 401 and an elliptical-shaped embodiment 402 .
  • the latter elliptical embodiment 402 also includes other embodiments 402 ′, 402 ′′ and 402 ′′′.
  • FIG. 5A depicts the apparatus 100 with two layers of the spherical objects 401 .
  • FIG. 5B depicts the apparatus 100 with three layers of the spherical objects 401 .
  • FIG. 5C depicts the apparatus 100 with two or more layers of the spherical objects 401 .
  • FIG. 6A depicts the apparatus 100 with two layers of the elliptical objects 402 .
  • FIG. 6B depicts the apparatus 100 with three layers of the elliptical objects 402 .
  • FIG. 6C depicts the apparatus 100 with two or more layers of the elliptical objects 402 .
  • FIG. 7A depicts the apparatus 100 with two layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402 .
  • FIG. 7B depicts the apparatus 100 with three layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402 .
  • FIG. 7C depicts the apparatus 100 with two or more layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402 .
  • an apparatus for coating a photoreceptor substrate such as a photoreceptor belt or a photoreceptor drum.
  • the apparatus comprises at least one photoreceptor coating fluid reservoir or diptank.
  • the diptank defines an inlet at one end and a conduit with an orifice at the other end.
  • the conduit includes at least one porous element such as a grid, screen or mesh arranged for suspending a plurality of layers of non-contaminating rounded objects, such as stainless steel or glass beads, in the bottom of the conduit.
  • Photoreceptor coating solution supplied to the inlet is thereby forced to flow through the plurality of layers of beads prior to coating a photoreceptor substrate that is inserted through the orifice.
  • the uniformity of the coating solution is improved as it coats the photoreceptor substrate, thereby reducing coating defects in the finished photoreceptor belt or drum.
  • FIGS. 2 A- 2 B there are shown typical photoreceptor substrates which may be used relative to the present invention.
  • FIG. 2A there is shown a flexible photoreceptor belt substrate 20 A and in FIG. 2B there is shown a cylindrical-shaped photoreceptor drum substrate 20 B.
  • FIG. 1 there is shown an apparatus 100 for coating at least one of the foregoing substrates 20 A and 20 B with a fluid 200 .
  • the fluid 200 comprises photoreceptor coating solution.
  • the apparatus 100 comprises at least one diptank 10 .
  • the diptank 10 defines an inlet 1 at one end and a conduit 9 with an orifice 11 at the other end.
  • the conduit 9 forms a conduit inner diameter 12 .
  • the conduit 9 includes means 31 - 32 for suspending a plurality of layers of rounded objects or beads 400 substantially across and thereby covering the conduit inner diameter 12 .
  • the plurality of layers of rounded objects 400 are suspended near the bottom 15 of the conduit 9 .
  • the plurality of layers of rounded objects 400 are positioned between the inlet 1 and the orifice 11 .
  • substantially all of the fluid 200 that is supplied 2 A to the inlet 1 initially is forced to flow 2 B through the plurality of layers of rounded objects 400 before later flowing 2 C towards the orifice 11 , thereby coating a substrate 20 A or 20 B that previously has been inserted or dipped 80 through the orifice 11 .
  • the means for suspending the rounded objects 400 comprise only a first, lower, porous element 31 , with the rounded objects 400 being disposed on top of the porous element 31 .
  • the means for suspending the rounded objects 400 comprise both the foregoing first, lower, porous element 31 and also a second, upper, porous element 32 , with the rounded objects 400 being disposed between the first porous element 31 and the second porous element 32 .
  • the first porous element 31 has a plurality of apertures 301 dispersed throughout.
  • the second porous element 32 likewise has a plurality of apertures 302 dispersed throughout.
  • either or both of the porous elements 31 and 32 comprise a grid, screen or mesh.
  • either or both of the porous elements 31 and 32 are similar to the porous membrane 30 of the foregoing U.S. Pat. No. 5,681,392.
  • either or both of the porous elements 31 and 32 are similar to the perforated plate 40 of the foregoing U.S. Pat. No. 5,681,392.
  • the rounded objects 400 comprise spherical-shaped objects, such as the depicted spherical object 401 ; elliptical-shaped objects, such as the depicted elliptical objects 402 ; and a mixture of spherical objects 401 and elliptical objects 402 .
  • the depicted elliptical-shaped object 402 includes variations thereof, including the depicted elliptical object embodiments 402 ′, 402 ′′ and 402 ′′′. While only the elliptical embodiments 402 ′, 402 ′′ and 402 ′′′ are shown, it will be understood that still other embodiments of the elliptical-shaped object 402 are possible.
  • the rounded objects 400 of the present invention including the foregoing spherical object 401 and the elliptical object 402 (including the elliptical embodiments 402 ′, 402 ′′ and 402 ′′′), have a smooth surface, are non-contaminating, with diameters varying from 10 to 30 millimeters. It will be understood that the rounded objects 400 are commonly known as “beads”.
  • the rounded objects 400 are generally comprised of glass.
  • the rounded objects 400 are generally comprised of a ceramic material such as, for example, porcelain, aluminum oxide, titanium dioxide, or equivalents thereof.
  • the rounded objects 400 are generally comprised of metal such as, for example, aluminum, stainless steel or titanium.
  • the apparatus 100 comprises a plurality of layers of rounded objects 400 wherein substantially all of the rounded objects 400 are comprised of a single (1) material, such as glass, ceramic, or metal.
  • the apparatus 100 comprises a plurality of layers of rounded objects 400 comprised of more than one (1) material.
  • a hypothetical apparatus 100 might comprise a plurality of layers of rounded objects 400 wherein 50% of the rounded objects 400 are comprised of glass, and the remaining 50% of the rounded objects 400 are comprised of metal.
  • the apparatus 100 comprises a plurality of layers of rounded objects 400 wherein substantially all of the rounded objects 400 are comprised of similar dimensions or diameters.
  • the apparatus 100 comprises a plurality of layers of rounded objects 400 comprised of different or varying dimensions.
  • a hypothetical apparatus 100 might comprise a plurality of layers of rounded objects 400 wherein 35% of the rounded objects 400 have diameters of 10 millimeters, and the remaining 65% of the rounded objects 400 have diameters of 20 millimeters.
  • FIGS. 5 - 7 there is depicted various embodiments of the apparatus 100 comprising a plurality of layers of rounded objects 400 suspended in the conduit 9 by the suspending means 31 - 32 , as depicted in FIG. 1.
  • FIGS. 5 - 7 are briefly summarized as follows:
  • FIG. 5 depicts various embodiments of the apparatus 100 wherein the plurality of layers of rounded objects 400 generally comprise the spherical objects 401 .
  • FIG. 6 depicts various embodiments of the apparatus 100 wherein the plurality of layers of rounded objects 400 generally comprise the elliptical objects 402 .
  • FIG. 7 depicts various embodiments of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise one or more spherical objects 401 and one or more elliptical objects 402 .
  • FIG. 5A there is depicted one embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two (2) layers of the spherical objects 401 .
  • FIG. 5B there is depicted another embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise three (3) layers of the spherical objects 401 .
  • FIG. 5C there is depicted still another embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two or more (i.e., 2 , 3 , 4 , 5 , or a still greater number, etc.) layers of the spherical objects 401 .
  • FIG. 6 comprising three separate views respectively designated FIGS. 6A, 6B and 6 C.
  • FIG. 6A there is depicted one embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two (2) layers of the elliptical objects 402 .
  • substantially all such elliptical objects 402 are comprised of an identical elliptical shape, such as, for example, only one of the elliptical object embodiments 402 ′, 402 ′′ and 402 ′′′ depicted in FIG. 4.
  • FIG. 6A there is depicted one embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two (2) layers of the elliptical objects 402 .
  • substantially all such elliptical objects 402 are comprised of an identical elliptical shape, such as, for example, only one of the elliptical object embodiments 402 ′, 402 ′′ and 402 ′′′ depicted in FIG. 4.
  • FIG. 4 In another contrasting embodiment of FIG.
  • such elliptical objects 402 are comprised of different elliptical shapes, such as, for example, at least two of the elliptical object embodiments 402 ′, 402 ′′ and 402 ′′′ depicted in FIG. 4.
  • FIG. 6B there is depicted another embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise three (3) layers of the elliptical objects 402 .
  • substantially all such elliptical objects 402 are comprised of an identical elliptical shape, such as, for example, only one of the elliptical object embodiments 402 ′, 402 ′′ and 402 ′′′ depicted in FIG. 4.
  • FIG. 6B there is depicted another embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise three (3) layers of the elliptical objects 402 .
  • substantially all such elliptical objects 402 are comprised of an identical elliptical shape, such as, for example, only one of the elliptical object embodiments 402 ′, 402 ′′ and 402 ′′′ depicted in FIG. 4.
  • FIG. 4 In another contrasting embodiment of FIG.
  • such elliptical objects 402 are comprised of different elliptical shapes, such as, for example, at least two of the elliptical object embodiments 402 ′, 402 ′′ and 402 ′′′ depicted in FIG. 4.
  • FIG. 6C there is depicted still another embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two or more (i.e., 2 , 3 , 4 , 5 , or a still greater number, etc.) layers of the elliptical objects 402 .
  • substantially all such elliptical objects 402 are comprised of an identical elliptical shape, such as, for example, only one of the elliptical object embodiments 402 ′, 402 ′′ and 402 ′′′ depicted in FIG. 4.
  • FIG. 6C there is depicted still another embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two or more (i.e., 2 , 3 , 4 , 5 , or a still greater number, etc.) layers of the elliptical objects 402 .
  • substantially all such elliptical objects 402 are comprised of an identical elliptical shape, such as, for example, only one of the ellipt
  • such elliptical objects 402 are comprised of different elliptical shapes, such as, for example, at least two of the elliptical object embodiments 402 ′, 402 ′′ and 402 ′′′ depicted in FIG. 4.
  • FIG. 7 comprising three separate views respectively designated FIGS. 7A, 7B and 7 C.
  • FIG. 7A there is depicted one embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two (2) layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402 .
  • the two (2) layers of rounded objects 400 comprise a fixed or predetermined combination or arrangement of one or more spherical objects 401 and one or more elliptical objects 402 .
  • the two (2) layers of rounded objects 400 comprise an arbitrary or random combination or arrangement of one or more spherical objects 401 and one or more elliptical objects 402 .
  • the two (2) layers of rounded objects 400 comprise only one (1) spherical object 401 .
  • the two (2) layers of rounded objects 400 comprise only one (1) elliptical object 402 .
  • FIG. 7B there is depicted another embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise three (3) layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402 .
  • the three (2) layers of rounded objects 400 comprise a fixed or predetermined combination or arrangement of one or more spherical objects 401 and one or more elliptical objects 402 .
  • the three (2) layers of rounded objects 400 comprise an arbitrary or random combination or arrangement of one or more spherical objects 401 and one or more elliptical objects 402 .
  • the three (3) layers of rounded objects 400 comprise only one (1) spherical object 401 .
  • the three (3) layers of rounded objects 400 comprise only one (1) elliptical object 402 .
  • FIG. 7C there is depicted still another embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two (2) or more (i.e., 2 , 3 , 4 , 5 , or a still greater number, etc.) layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402 .
  • the two (2) or more layers of rounded objects 400 comprise a fixed or predetermined combination or arrangement of one or more spherical objects 401 and one or more elliptical objects 402 .
  • FIG. 7C there is depicted still another embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two (2) or more (i.e., 2 , 3 , 4 , 5 , or a still greater number, etc.) layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402 .
  • the two (2) or more layers of rounded objects 400 comprise
  • the two (2) or more layers of rounded objects 400 comprise an arbitrary or random combination or arrangement of one or more spherical objects 401 and one or more elliptical objects 402 .
  • the two (2) or more layers of rounded objects 400 comprise only one (1) spherical object 401 .
  • the two (2) or more layers of rounded objects 400 comprise only one (1) elliptical object 402 .
  • the apparatus 100 comprising at least one diptank 10 defining an inlet 1 and a conduit 9 with an orifice 11 , the conduit 9 including means 31 - 32 for suspending a plurality of layers of rounded objects 400 , so that fluid 200 supplied 2 A to the inlet 1 flows 2 B through the plurality of layers of rounded objects 400 to coat 2 C a substrate that is inserted 80 through the orifice 11 , the method comprising supplying 2 A fluid to the inlet 1 and inserting 80 at least one substrate through the orifice 11 .
  • the at least one substrate comprises a photoreceptor substrate 20 A or 20 B and the fluid 200 comprising photoreceptor coating solution.
  • this invention suspends plural layers of noncontaminating rounded objects, commonly known as “beads”, between suspension devices such as mesh screens. These layers of rounded objects are then placed in the bottom of the dip tank. As a result, the photoreceptor substrate coating process becomes more uniform, which reduces coating defects in the resulting finished photoreceptor belts or drums.
  • one possible theory of operation is that the layers of rounded objects create additional shear in the solution as it is being pumped into the tank.
  • the increased shear in the solution reduces flocculation, reduces solvent-rich and pigment-rich zones in the tank, disperses the flow in the tank, and eliminates stagnant zones which trap contaminants.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Coating Apparatus (AREA)

Abstract

An apparatus for coating a photoreceptor substrate, such as a photoreceptor belt or a photoreceptor drum, consists of at least one photoreceptor coating fluid reservoir or diptank. The diptank defines an inlet at one end and a conduit with an orifice at the other end. The conduit includes at least one porous element such as a grid, screen or mesh arranged for suspending a plurality of layers of non-contaminating rounded objects, such as stainless steel or glass beads, in the bottom of the conduit. Photoreceptor coating solution supplied to the inlet is thereby forced to flow through the plurality of layers of beads prior to coating a photoreceptor substrate that is inserted through the orifice. As a result, the uniformity of the coating solution is improved as it coats the photoreceptor substrate, thereby reducing coating defects in the finished photoreceptor belt or drum.

Description

    INCORPORATION BY REFERENCE OF OTHER U.S. PATENT
  • The disclosure of commonly-assigned U.S. Pat. No. 5,681,392 by Eugene A. Swain, entitled “Fluid reservoir containing panels for reducing rate of fluid flow,” issued Oct. 28, 1997 is hereby incorporated by reference in this application verbatim, with the same effect as though such disclosure were fully and completely set forth herein. It is noted that the same Eugene A. Swain is a named inventor both in the foregoing U.S. patent and in the present application.[0001]
  • TECHNICAL FIELD
  • This invention relates to coating photoreceptor substrates using dip tanks and more particularly to coating photoreceptor substrates using a dip tank arranged with a plurality of layers of rounded objects or beads. [0002]
  • BACKGROUND OF THE INVENTION
  • It is known to use coating fluid reservoirs or “diptanks” to apply photoreceptor coating solution to coat photoreceptor devices such as photoreceptor flexible belts and cylindrical-shaped drums. In the foregoing U.S. Pat. No. 5,681,392 to Eugene A. Swain, for example, the fluid reservoir (equivalent to a diptank) [0003] 10 is used to supply organic photoreceptor coating fluid 80 to coat a flexible belt-type photoreceptor substrate 60.
  • In this coating process, a photoreceptor substrate (belt or drum) is immersed or “dipped” into the orifice of a tank containing the solution to be coated and then withdrawn at a rate that controls the coating thickness. The usual mechanism to coat the substrate is to pump a coating solution containing the active materials, either dissolved or in suspension (such as pigments), into the tank from an inlet located in the bottom of the diptank and continuously overflow the tank at the orifice located at the top of the tank. In this way the substrate is subjected to a uniform flow of solution relative to the coating speed. [0004]
  • There are several disadvantages to the dip coating process which can result in defects on the coated substrate surface. [0005]
  • For example, typically there is very little radial surface velocity of the coating solution at the top of the tank. In fact, usually there is a conical volume in the tank where there is relatively little coating solution flow. As a result of non-uniformities in the coating solution, coating streaks can occur along part or all of the dipped length of the photoreceptor substrate. Such non-uniformities can occur especially from dispersions that have poor stability and display a property of non-uniform dispersion distribution called flocculation. [0006]
  • As is known, flocculation occurs when there is little or no movement or shear of the solution, such as the conical volume of the tank discussed above. Flocculation results in solvent-rich and pigment-rich zones in the dip tank. Unfortunately, such zones are exactly where the photoreceptor substrate is immersed. Ultimately, these phenomena can result in coating streaks or other defects in the resulting finished photoreceptor device. [0007]
  • As a result, there is a need for an improved apparatus and method for coating photoreceptor substrates. [0008]
  • SUMMARY OF THE INVENTION
  • In one aspect of the invention, there is provided an apparatus for coating at least one substrate with a fluid. The apparatus comprises at least one diptank defining an inlet and a conduit with an orifice, the conduit including means for suspending a plurality of layers of rounded objects so that fluid supplied to the inlet flows through the plurality of layers of rounded objects to coat a substrate that is inserted through the orifice. [0009]
  • In another aspect of the invention, there is provided a method for coating at least one substrate with a fluid. The method uses an apparatus comprising at least one diptank defining an inlet and a conduit with an orifice, the conduit including means for suspending a plurality of layers of rounded objects, so that fluid supplied to the inlet flows through the plurality of layers of rounded objects to coat a substrate that is inserted through the orifice. The method comprises supplying fluid to the inlet and inserting at least one substrate through the orifice.[0010]
  • BRIEF DESCRIPTION OF THE DRAWING
  • FIG. 1 depicts an [0011] apparatus 100 for coating photoreceptor substrates in accordance with the present invention.
  • FIG. 2A depicts a [0012] photoreceptor belt substrate 20A that may be coated by the FIG. 1 apparatus.
  • FIG. 2B depicts a [0013] photoreceptor drum substrate 20B that may be coated by the FIG. 1 apparatus.
  • FIG. 3A depicts a first [0014] porous element 31 of the apparatus 100.
  • FIG. 3B depicts a second [0015] porous element 32 of the apparatus 100.
  • FIG. 4 depicts various embodiments of rounded objects or [0016] beads 400 that may be used in the apparatus 100. As shown, the rounded objects 400 include a spherical-shaped embodiment 401 and an elliptical-shaped embodiment 402. As shown, the latter elliptical embodiment 402 also includes other embodiments 402′, 402″ and 402′″.
  • FIG. 5A depicts the [0017] apparatus 100 with two layers of the spherical objects 401.
  • FIG. 5B depicts the [0018] apparatus 100 with three layers of the spherical objects 401.
  • FIG. 5C depicts the [0019] apparatus 100 with two or more layers of the spherical objects 401.
  • FIG. 6A depicts the [0020] apparatus 100 with two layers of the elliptical objects 402.
  • FIG. 6B depicts the [0021] apparatus 100 with three layers of the elliptical objects 402.
  • FIG. 6C depicts the [0022] apparatus 100 with two or more layers of the elliptical objects 402.
  • FIG. 7A depicts the [0023] apparatus 100 with two layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402.
  • FIG. 7B depicts the [0024] apparatus 100 with three layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402.
  • FIG. 7C depicts the [0025] apparatus 100 with two or more layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402.
  • DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Briefly, there is disclosed an apparatus for coating a photoreceptor substrate, such as a photoreceptor belt or a photoreceptor drum. The apparatus comprises at least one photoreceptor coating fluid reservoir or diptank. The diptank defines an inlet at one end and a conduit with an orifice at the other end. The conduit includes at least one porous element such as a grid, screen or mesh arranged for suspending a plurality of layers of non-contaminating rounded objects, such as stainless steel or glass beads, in the bottom of the conduit. Photoreceptor coating solution supplied to the inlet is thereby forced to flow through the plurality of layers of beads prior to coating a photoreceptor substrate that is inserted through the orifice. As a result, the uniformity of the coating solution is improved as it coats the photoreceptor substrate, thereby reducing coating defects in the finished photoreceptor belt or drum. [0026]
  • Referring now generally to FIGS. [0027] 2A-2B, there are shown typical photoreceptor substrates which may be used relative to the present invention. For example, in FIG. 2A there is shown a flexible photoreceptor belt substrate 20A and in FIG. 2B there is shown a cylindrical-shaped photoreceptor drum substrate 20B.
  • Referring now to FIG. 1, there is shown an [0028] apparatus 100 for coating at least one of the foregoing substrates 20A and 20B with a fluid 200. In one embodiment, the fluid 200 comprises photoreceptor coating solution.
  • As shown in FIG. 1, the [0029] apparatus 100 comprises at least one diptank 10. The diptank 10 defines an inlet 1 at one end and a conduit 9 with an orifice 11 at the other end. In turn, the conduit 9 forms a conduit inner diameter 12. As discussed in greater detail below, the conduit 9 includes means 31-32 for suspending a plurality of layers of rounded objects or beads 400 substantially across and thereby covering the conduit inner diameter 12. As shown, the plurality of layers of rounded objects 400 are suspended near the bottom 15 of the conduit 9. Thus suspended, the plurality of layers of rounded objects 400 are positioned between the inlet 1 and the orifice 11. Moreover, as a result of such position, substantially all of the fluid 200 that is supplied 2A to the inlet 1 initially is forced to flow 2B through the plurality of layers of rounded objects 400 before later flowing 2C towards the orifice 11, thereby coating a substrate 20A or 20B that previously has been inserted or dipped 80 through the orifice 11.
  • Still referring to FIG. 1, in one embodiment, the means for suspending the [0030] rounded objects 400 comprise only a first, lower, porous element 31, with the rounded objects 400 being disposed on top of the porous element 31. In another embodiment, the means for suspending the rounded objects 400 comprise both the foregoing first, lower, porous element 31 and also a second, upper, porous element 32, with the rounded objects 400 being disposed between the first porous element 31 and the second porous element 32.
  • Turning now to FIG. 3A, it is seen that the first [0031] porous element 31 has a plurality of apertures 301 dispersed throughout. As well, turning now to FIG. 3B, it is seen the second porous element 32 likewise has a plurality of apertures 302 dispersed throughout.
  • In one embodiment, either or both of the [0032] porous elements 31 and 32 comprise a grid, screen or mesh.
  • In another embodiment, either or both of the [0033] porous elements 31 and 32 are similar to the porous membrane 30 of the foregoing U.S. Pat. No. 5,681,392.
  • In still another embodiment, either or both of the [0034] porous elements 31 and 32 are similar to the perforated plate 40 of the foregoing U.S. Pat. No. 5,681,392.
  • Referring now to FIG. 4, there are shown various embodiments of the FIG. 1 rounded [0035] objects 400. As shown, the rounded objects 400 comprise spherical-shaped objects, such as the depicted spherical object 401; elliptical-shaped objects, such as the depicted elliptical objects 402; and a mixture of spherical objects 401 and elliptical objects 402.
  • Referring still to FIG. 4, it will be understood the depicted elliptical-shaped [0036] object 402 includes variations thereof, including the depicted elliptical object embodiments 402′, 402″ and 402′″. While only the elliptical embodiments 402′, 402″ and 402′″ are shown, it will be understood that still other embodiments of the elliptical-shaped object 402 are possible.
  • Still referring to FIG. 4, the [0037] rounded objects 400 of the present invention, including the foregoing spherical object 401 and the elliptical object 402 (including the elliptical embodiments 402′, 402″ and 402′″), have a smooth surface, are non-contaminating, with diameters varying from 10 to 30 millimeters. It will be understood that the rounded objects 400 are commonly known as “beads”.
  • In one embodiment, the [0038] rounded objects 400 are generally comprised of glass.
  • In another embodiment, the [0039] rounded objects 400 are generally comprised of a ceramic material such as, for example, porcelain, aluminum oxide, titanium dioxide, or equivalents thereof.
  • In still another embodiment, the [0040] rounded objects 400 are generally comprised of metal such as, for example, aluminum, stainless steel or titanium.
  • Returning momentarily to FIG. 1, in one embodiment the [0041] apparatus 100 comprises a plurality of layers of rounded objects 400 wherein substantially all of the rounded objects 400 are comprised of a single (1) material, such as glass, ceramic, or metal. In contrast, in another embodiment, the apparatus 100 comprises a plurality of layers of rounded objects 400 comprised of more than one (1) material. As an example of this latter contrasting embodiment, for example, a hypothetical apparatus 100 might comprise a plurality of layers of rounded objects 400 wherein 50% of the rounded objects 400 are comprised of glass, and the remaining 50% of the rounded objects 400 are comprised of metal.
  • Still referring to FIG. 1, in one embodiment the [0042] apparatus 100 comprises a plurality of layers of rounded objects 400 wherein substantially all of the rounded objects 400 are comprised of similar dimensions or diameters. In contrast, in another embodiment, the apparatus 100 comprises a plurality of layers of rounded objects 400 comprised of different or varying dimensions. As an example of this latter contrasting embodiment, for example, a hypothetical apparatus 100 might comprise a plurality of layers of rounded objects 400 wherein 35% of the rounded objects 400 have diameters of 10 millimeters, and the remaining 65% of the rounded objects 400 have diameters of 20 millimeters.
  • Referring now generally to FIGS. [0043] 5-7, there is depicted various embodiments of the apparatus 100 comprising a plurality of layers of rounded objects 400 suspended in the conduit 9 by the suspending means 31-32, as depicted in FIG. 1.
  • FIGS. [0044] 5-7 are briefly summarized as follows:
  • FIG. 5 depicts various embodiments of the [0045] apparatus 100 wherein the plurality of layers of rounded objects 400 generally comprise the spherical objects 401.
  • FIG. 6 depicts various embodiments of the [0046] apparatus 100 wherein the plurality of layers of rounded objects 400 generally comprise the elliptical objects 402.
  • FIG. 7 depicts various embodiments of the [0047] apparatus 100 wherein the plurality of layers of rounded objects 400 comprise one or more spherical objects 401 and one or more elliptical objects 402.
  • Refer now to FIG. 5, comprising three separate views respectively designated FIGS. 5A, 5B and [0048] 5C. In FIG. 5A there is depicted one embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two (2) layers of the spherical objects 401. In FIG. 5B there is depicted another embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise three (3) layers of the spherical objects 401. In FIG. 5C there is depicted still another embodiment of the apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two or more (i.e., 2, 3, 4, 5, or a still greater number, etc.) layers of the spherical objects 401.
  • Refer now to FIG. 6, comprising three separate views respectively designated FIGS. 6A, 6B and [0049] 6C.
  • In FIG. 6A there is depicted one embodiment of the [0050] apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two (2) layers of the elliptical objects 402. In one embodiment of FIG. 6A, substantially all such elliptical objects 402 are comprised of an identical elliptical shape, such as, for example, only one of the elliptical object embodiments 402′, 402″ and 402′″ depicted in FIG. 4. In another contrasting embodiment of FIG. 6A, such elliptical objects 402 are comprised of different elliptical shapes, such as, for example, at least two of the elliptical object embodiments 402′, 402″ and 402′″ depicted in FIG. 4.
  • In FIG. 6B there is depicted another embodiment of the [0051] apparatus 100 wherein the plurality of layers of rounded objects 400 comprise three (3) layers of the elliptical objects 402. In one embodiment of FIG. 6B, substantially all such elliptical objects 402 are comprised of an identical elliptical shape, such as, for example, only one of the elliptical object embodiments 402′, 402″ and 402′″ depicted in FIG. 4. In another contrasting embodiment of FIG. 6B, such elliptical objects 402 are comprised of different elliptical shapes, such as, for example, at least two of the elliptical object embodiments 402′, 402″ and 402′″ depicted in FIG. 4.
  • In FIG. 6C there is depicted still another embodiment of the [0052] apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two or more (i.e., 2, 3, 4, 5, or a still greater number, etc.) layers of the elliptical objects 402. In one embodiment of FIG. 6C, substantially all such elliptical objects 402 are comprised of an identical elliptical shape, such as, for example, only one of the elliptical object embodiments 402′, 402″ and 402′″ depicted in FIG. 4. In another contrasting embodiment of FIG. 6C, such elliptical objects 402 are comprised of different elliptical shapes, such as, for example, at least two of the elliptical object embodiments 402′, 402″ and 402′″ depicted in FIG. 4.
  • Refer now to FIG. 7, comprising three separate views respectively designated FIGS. 7A, 7B and [0053] 7C.
  • In FIG. 7A there is depicted one embodiment of the [0054] apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two (2) layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402. In one embodiment of FIG. 7A, the two (2) layers of rounded objects 400 comprise a fixed or predetermined combination or arrangement of one or more spherical objects 401 and one or more elliptical objects 402. In another embodiment of FIG. 7A, the two (2) layers of rounded objects 400 comprise an arbitrary or random combination or arrangement of one or more spherical objects 401 and one or more elliptical objects 402. In a further embodiment of FIG. 7A, the two (2) layers of rounded objects 400 comprise only one (1) spherical object 401. In a still further embodiment of FIG. 7A, the two (2) layers of rounded objects 400 comprise only one (1) elliptical object 402.
  • In FIG. 7B there is depicted another embodiment of the [0055] apparatus 100 wherein the plurality of layers of rounded objects 400 comprise three (3) layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402. In one embodiment of FIG. 7B, the three (2) layers of rounded objects 400 comprise a fixed or predetermined combination or arrangement of one or more spherical objects 401 and one or more elliptical objects 402. In another embodiment of FIG. 7B, the three (2) layers of rounded objects 400 comprise an arbitrary or random combination or arrangement of one or more spherical objects 401 and one or more elliptical objects 402. In a further embodiment of FIG. 7B, the three (3) layers of rounded objects 400 comprise only one (1) spherical object 401. In a still further embodiment of FIG. 7B, the three (3) layers of rounded objects 400 comprise only one (1) elliptical object 402.
  • In FIG. 7C there is depicted still another embodiment of the [0056] apparatus 100 wherein the plurality of layers of rounded objects 400 comprise two (2) or more (i.e., 2, 3, 4, 5, or a still greater number, etc.) layers of rounded objects 400 comprising one or more spherical objects 401 and one or more elliptical objects 402. In one embodiment of FIG. 7C, the two (2) or more layers of rounded objects 400 comprise a fixed or predetermined combination or arrangement of one or more spherical objects 401 and one or more elliptical objects 402. In another embodiment of FIG. 7C, the two (2) or more layers of rounded objects 400 comprise an arbitrary or random combination or arrangement of one or more spherical objects 401 and one or more elliptical objects 402. In a further embodiment of FIG. 7C, the two (2) or more layers of rounded objects 400 comprise only one (1) spherical object 401. In a still further embodiment of FIG. 7C, the two (2) or more layers of rounded objects 400 comprise only one (1) elliptical object 402.
  • In addition to disclosing the [0057] apparatus 100 depicted in FIG. 1 and described hereinabove, it will be understood that there has also been disclosed a method.
  • In particular, there has been disclosed a method for coating at least one substrate with a fluid [0058] 200 using the apparatus 100, the apparatus 100 comprising at least one diptank 10 defining an inlet 1 and a conduit 9 with an orifice 11, the conduit 9 including means 31-32 for suspending a plurality of layers of rounded objects 400, so that fluid 200 supplied 2A to the inlet 1 flows 2B through the plurality of layers of rounded objects 400 to coat 2C a substrate that is inserted 80 through the orifice 11, the method comprising supplying 2A fluid to the inlet 1 and inserting 80 at least one substrate through the orifice 11.
  • Moreover, in one embodiment of the foregoing method, it will be understood that the at least one substrate comprises a [0059] photoreceptor substrate 20A or 20B and the fluid 200 comprising photoreceptor coating solution.
  • In summary, this invention suspends plural layers of noncontaminating rounded objects, commonly known as “beads”, between suspension devices such as mesh screens. These layers of rounded objects are then placed in the bottom of the dip tank. As a result, the photoreceptor substrate coating process becomes more uniform, which reduces coating defects in the resulting finished photoreceptor belts or drums. [0060]
  • While not essential to practicing the invention, one possible theory of operation is that the layers of rounded objects create additional shear in the solution as it is being pumped into the tank. According to this theory, the increased shear in the solution reduces flocculation, reduces solvent-rich and pigment-rich zones in the tank, disperses the flow in the tank, and eliminates stagnant zones which trap contaminants. [0061]
  • While various embodiments of an apparatus and method for coating photoreceptor substrates, in accordance with the invention, have been described hereinabove, the scope of the invention is defined by the following claims. [0062]

Claims (50)

What is claimed is:
1. An apparatus for coating at least one substrate with a fluid, the apparatus comprising at least one diptank defining an inlet and a conduit with an orifice, the conduit including means for suspending a plurality of layers of rounded objects so that fluid supplied to the inlet flows through the plurality of layers of rounded objects to coat a substrate that is inserted through the orifice.
2. The apparatus of claim 1, the at least one substrate comprising a photoreceptor substrate and the fluid comprising photoreceptor coating solution.
3. The apparatus of claim 2, the at least one photoreceptor substrate comprising a belt.
4. The apparatus of claim 2, the at least one photoreceptor substrate comprising a cylindrical-shaped drum.
5. The apparatus of claim 1, the plurality of layers of rounded objects being suspended near the bottom of the diptank.
6. The apparatus of claim 1, the sus pending means comprising at least one porous element with a plurality of apertures dispersed throughout.
7. The apparatus of claim 1, the suspending means comprising at least two porous elements each with a plurality of apertures dispersed throughout.
8. The apparatus of claim 7, each porous element comprising a grid, screen or mesh.
9. The apparatus of claim 1, the plurality of layers of rounded objects comprising two layers of rounded objects.
10. The apparatus of claim 9, the two layers of rounded objects generally comprising spherically-shaped objects.
11. The apparatus of claim 9, the two layers of rounded objects generally comprising elliptically-shaped objects.
12. The apparatus of claim 9, the two layers of rounded objects comprising one or more spherically-shaped objects and one or more elliptically-shaped objects.
13. The apparatus of claim 1, the plurality of layers of rounded objects comprising three layers of rounded objects.
14. The apparatus of claim 13, the three layers of rounded objects generally comprising spherically-shaped objects.
15. The apparatus of claim 13, the three layers of rounded objects generally comprising elliptically-shaped objects.
16. The apparatus of claim 13, the three layers of rounded objects comprising one or more spherically-shaped objects and one or more elliptically-shaped objects.
17. The apparatus of claim 1, the plurality of layers of rounded objects comprising two or more layers of rounded objects.
18. The apparatus of claim 17, the two or more layers of rounded objects generally comprising spherically-shaped objects.
19. The apparatus of claim 17, the two or more layers of rounded objects generally comprising elliptically-shaped objects.
20. The apparatus of claim 17, the two or more layers of rounded objects comprising one or more spherically-shaped objects and one or more elliptically-shaped objects.
21. The apparatus of claim 1, the rounded objects generally comprised of glass.
22. The apparatus of claim 1, the rounded objects generally comprised of a ceramic material.
23. The apparatus of claim 22, the ceramic material comprising porcelain, aluminum oxide or titanium dioxide.
24. The apparatus of claim 1, the rounded objects generally comprised of metal.
25. The apparatus of claim 24, the metal comprising aluminum, stainless steel or titanium.
26. A method for coating at least one substrate with a fluid using an apparatus, the apparatus comprising at least one diptank defining an inlet and a conduit with an orifice, the conduit including means for suspending a plurality of layers of rounded objects, so that fluid supplied to the inlet flows through the plurality of layers of rounded objects to coat a substrate that is inserted through the orifice, the method comprising supplying fluid to the inlet and inserting at least one substrate through the orifice.
27. The method of claim 26, the at least one substrate comprising a photoreceptor substrate and the fluid comprising photoreceptor coating solution.
28. The method of claim 27, the at least one photoreceptor substrate comprising a belt.
29. The method of claim 27, the at least one photoreceptor substrate comprising a cylindrical-shaped drum.
30. The apparatus of claim 26, the plurality of layers of rounded objects being suspended near the bottom of the diptank.
31. The method of claim 26, the suspending means comprising at least one porous element with a plurality of apertures dispersed throughout.
32. The method of claim 26, the suspending means comprising at least two porous elements each with a plurality of apertures dispersed throughout.
33. The method of claim 32, each porous element comprising a grid, screen or mesh.
34. The method of claim 26, the plurality of layers of rounded objects comprising two layers of rounded objects.
35. The method of claim 34, the two layers of rounded objects generally comprising spherically-shaped objects.
36. The method of claim 34, the two layers of rounded objects generally comprising elliptically-shaped objects.
37. The method of claim 34, the two layers of rounded objects comprising one or more spherically-shaped objects and one or more elliptically-shaped objects.
38. The method of claim 26, the plurality of layers of rounded objects comprising three layers of rounded objects.
39. The method of claim 38, the three layers of rounded objects generally comprising spherically-shaped objects.
40. The method of claim 38, the three layers of rounded objects generally comprising elliptically-shaped objects.
41. The method of claim 38, the three layers of rounded objects comprising one or more spherically-shaped objects and one or more elliptically-shaped objects.
42. The method of claim 26, the plurality of layers of rounded objects comprising two or more layers of rounded objects.
43. The method of claim 42, the two or more layers of rounded objects generally comprising spherically-shaped objects.
44. The method of claim 42, the two or more layers of rounded objects generally comprising elliptically-shaped objects.
45. The method of claim 42, the two or more layers of rounded objects comprising one or more spherically-shaped objects and one or more elliptically-shaped objects.
46. The method of claim 26, the rounded objects generally comprised of glass.
47. The method of claim 26, the rounded objects generally comprised of a ceramic material.
48. The method of claim 47, the ceramic material comprising porcelain, aluminum oxide or titanium dioxide.
49. The method of claim 26, the rounded objects generally comprised of metal.
50. The method of claim 49, the metal comprising aluminum, stainless steel or titanium.
US09/969,387 2001-10-02 2001-10-02 Apparatus and method for coating photoreceptor substrates Expired - Lifetime US6569499B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US09/969,387 US6569499B2 (en) 2001-10-02 2001-10-02 Apparatus and method for coating photoreceptor substrates
JP2002278277A JP2003154299A (en) 2001-10-02 2002-09-25 Apparatus for coating base material with liquid
BRPI0203987-7A BR0203987B1 (en) 2001-10-02 2002-10-01 method for coating at least one substrate with a fluid using an apparatus.
DE60218797T DE60218797T2 (en) 2001-10-02 2002-10-02 Apparatus and method for coating photosensitive substrate
EP02022107A EP1300197B1 (en) 2001-10-02 2002-10-02 Apparatus and method for coating photoreceptor substrates
US10/287,754 US6746538B2 (en) 2001-10-02 2002-11-01 Apparatus and method for coating photoreceptor substrates
US11/438,405 US20060208768A1 (en) 2001-10-02 2006-05-22 High speed peak amplitude comparator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/969,387 US6569499B2 (en) 2001-10-02 2001-10-02 Apparatus and method for coating photoreceptor substrates

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US10/287,754 Division US6746538B2 (en) 2001-10-02 2002-11-01 Apparatus and method for coating photoreceptor substrates
US11/031,102 Continuation US7049856B2 (en) 2001-10-01 2005-01-06 High speed peak amplitude comparator

Publications (2)

Publication Number Publication Date
US20030064164A1 true US20030064164A1 (en) 2003-04-03
US6569499B2 US6569499B2 (en) 2003-05-27

Family

ID=25515504

Family Applications (2)

Application Number Title Priority Date Filing Date
US09/969,387 Expired - Lifetime US6569499B2 (en) 2001-10-02 2001-10-02 Apparatus and method for coating photoreceptor substrates
US10/287,754 Expired - Fee Related US6746538B2 (en) 2001-10-02 2002-11-01 Apparatus and method for coating photoreceptor substrates

Family Applications After (1)

Application Number Title Priority Date Filing Date
US10/287,754 Expired - Fee Related US6746538B2 (en) 2001-10-02 2002-11-01 Apparatus and method for coating photoreceptor substrates

Country Status (5)

Country Link
US (2) US6569499B2 (en)
EP (1) EP1300197B1 (en)
JP (1) JP2003154299A (en)
BR (1) BR0203987B1 (en)
DE (1) DE60218797T2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4252922A1 (en) * 2022-03-29 2023-10-04 Carl Zeiss Vision International GmbH Lacquer basin, method for dip coating an ophthalmic lens, coating device and ophthalmic lens

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2265452T3 (en) * 2000-12-21 2007-02-16 Vertex Pharmaceuticals Incorporated PIRAZOL COMPOUNDS USED AS INHIBITORS OF PROTEIN QUINASA.
MY141867A (en) 2002-06-20 2010-07-16 Vertex Pharma Substituted pyrimidines useful as protein kinase inhibitors
US6767405B2 (en) 2002-07-10 2004-07-27 Carmeda Ab Apparatus and process for coating articles
AR056763A1 (en) * 2005-11-03 2007-10-24 Vertex Pharma AMINOPIRIMIDINES REPLACED WITH TIAZOL OR PIRAZOL, USEFUL AS ANTICANCER AGENTS AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM.
JP4568674B2 (en) * 2005-11-07 2010-10-27 株式会社リコー Electrophotographic photoreceptor manufacturing apparatus and manufacturing method
MX2009009590A (en) * 2007-03-09 2009-11-10 Vertex Pharma Aminopyrimidines useful as inhibitors of protein kinases.
WO2008112646A1 (en) * 2007-03-09 2008-09-18 Vertex Pharmaceuticals Incorporated Aminopyridines useful as inhibitors of protein kinases
CA2694381A1 (en) * 2007-05-02 2008-11-13 Vertex Pharmaceuticals Incorporated Aminopyrimidines useful as kinase inhibitors
CA2685876A1 (en) * 2007-05-02 2008-11-13 Vertex Pharmaceuticals Incorporated Thiazoles and pyrazoles useful as kinase inhibitors
EP2323622A1 (en) * 2008-09-03 2011-05-25 Vertex Pharmaceuticals Incorporated Co-crystals and pharmaceutical formulations comprising the same
JP2014014740A (en) * 2012-07-06 2014-01-30 Sharp Corp Surface treatment device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178308A (en) * 1960-09-07 1965-04-13 Pfaudler Permutit Inc Chemical vapor plating process
CA1164632A (en) * 1981-10-19 1984-04-03 Jorg-Hein Walling Fluidizable bed structure
US5681392A (en) 1995-12-21 1997-10-28 Xerox Corporation Fluid reservoir containing panels for reducing rate of fluid flow
US5693372A (en) * 1996-02-29 1997-12-02 Xerox Corporation Immersion coating process
US5616365A (en) * 1996-06-10 1997-04-01 Xerox Corporation Coating method using an inclined surface

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4252922A1 (en) * 2022-03-29 2023-10-04 Carl Zeiss Vision International GmbH Lacquer basin, method for dip coating an ophthalmic lens, coating device and ophthalmic lens
WO2023186673A1 (en) 2022-03-29 2023-10-05 Carl Zeiss Vision International Gmbh Lacquer basin, method for dip coating an ophthalmic lens, coating device and ophthalmic lens
EP4360766A2 (en) 2022-03-29 2024-05-01 Carl Zeiss Vision International GmbH Lacquer basin, method for dip coating an ophthalmic lens, coating device and ophthalmic lens

Also Published As

Publication number Publication date
DE60218797T2 (en) 2007-06-28
BR0203987A (en) 2003-09-16
EP1300197A3 (en) 2005-11-16
JP2003154299A (en) 2003-05-27
DE60218797D1 (en) 2007-04-26
US6746538B2 (en) 2004-06-08
EP1300197A2 (en) 2003-04-09
US6569499B2 (en) 2003-05-27
US20030064166A1 (en) 2003-04-03
EP1300197B1 (en) 2007-03-14
BR0203987B1 (en) 2010-09-21

Similar Documents

Publication Publication Date Title
US6569499B2 (en) Apparatus and method for coating photoreceptor substrates
US10036108B2 (en) Apparatus and method for applications of optical fiber coatings
US6183941B1 (en) Soft impact dispense method
KR950000628B1 (en) Resin coating device for optical fiber
JPH0750275B2 (en) Liquid crystal display panel spacer sprinkler
US6613237B2 (en) Apparatus and method for removing matter on a fluid surface of a tank
JP5888269B2 (en) Application method to substrate
JP4573654B2 (en) Rubber roller coating method and dip coating apparatus
JP2013166089A (en) Method for applying coating material and coating apparatus
JP2569600B2 (en) Cylindrical substrate coating apparatus and cylindrical substrate coating method
JPS5990667A (en) Coating method
US20230271229A1 (en) Method of cleaning work and cleaning system for work
JP2796129B2 (en) Rectifier for coating liquid used in drum coating method
JPH07303853A (en) Apparatus for preparing organic photosensitive membrane for electrophotography
JPH0588385A (en) Dip coating equipment
JPH0427569Y2 (en)
US6444031B1 (en) Apparatus for coating photoreceptor devices
JPH0629972B2 (en) Method for producing electrophotographic photoreceptor by coating
KR101112197B1 (en) Apparatus of coating film
JPS5832776Y2 (en) flow coater
JPH10263488A (en) Liquid atomizing device
JP2675038B2 (en) Immersion coating equipment
JPS61178061A (en) Apparatus for coating drum
JPH0352668A (en) Liquid circulating system
JPH1048849A (en) Production of electrophotographic photoreceptor and float for dip coating

Legal Events

Date Code Title Description
AS Assignment

Owner name: XEROX CORPORATION, CONNECTICUT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GRAMMATICA, STEVEN J.;SWAIN, EUGENE A.;FRIDD, CHRISTOPHER R.;AND OTHERS;REEL/FRAME:012384/0697;SIGNING DATES FROM 20011213 TO 20011214

AS Assignment

Owner name: BANK ONE, NA, AS ADMINISTRATIVE AGENT, ILLINOIS

Free format text: SECURITY AGREEMENT;ASSIGNOR:XEROX CORPORATION;REEL/FRAME:013111/0001

Effective date: 20020621

Owner name: BANK ONE, NA, AS ADMINISTRATIVE AGENT,ILLINOIS

Free format text: SECURITY AGREEMENT;ASSIGNOR:XEROX CORPORATION;REEL/FRAME:013111/0001

Effective date: 20020621

STCF Information on status: patent grant

Free format text: PATENTED CASE

AS Assignment

Owner name: JPMORGAN CHASE BANK, AS COLLATERAL AGENT, TEXAS

Free format text: SECURITY AGREEMENT;ASSIGNOR:XEROX CORPORATION;REEL/FRAME:015134/0476

Effective date: 20030625

Owner name: JPMORGAN CHASE BANK, AS COLLATERAL AGENT,TEXAS

Free format text: SECURITY AGREEMENT;ASSIGNOR:XEROX CORPORATION;REEL/FRAME:015134/0476

Effective date: 20030625

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12

AS Assignment

Owner name: XEROX CORPORATION, NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:BANK ONE, NA;REEL/FRAME:037735/0218

Effective date: 20030625

Owner name: XEROX CORPORATION, NEW YORK

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A.;REEL/FRAME:037736/0276

Effective date: 20061204

AS Assignment

Owner name: XEROX CORPORATION, CONNECTICUT

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A. AS SUCCESSOR-IN-INTEREST ADMINISTRATIVE AGENT AND COLLATERAL AGENT TO BANK ONE, N.A.;REEL/FRAME:061388/0388

Effective date: 20220822

Owner name: XEROX CORPORATION, CONNECTICUT

Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:JPMORGAN CHASE BANK, N.A. AS SUCCESSOR-IN-INTEREST ADMINISTRATIVE AGENT AND COLLATERAL AGENT TO JPMORGAN CHASE BANK;REEL/FRAME:066728/0193

Effective date: 20220822